Two relays like this?
That relay is OK but it should be the only thing connected to the UNO 5V output power, except maybe pullup resistors for buttons
I didn't quite understand what you said. I will combine the relay outputs on the breadboard and there are other sensors I use. So it shouldn't be the sensors?
Hi,
Post some images of the setup that you are now building?
Thanks.. Tom.. 
The Uno has a limited current capability on the 5V output.
How may things will connect to the UNO 5V output power?
What are they?
We will see if you need a separate 5V supply?
In fact, my aim is to remotely turn the Led and Pump on and off with the Relay and on the other hand, to monitor the DHT11 (5V), DS12B20 (5V), PH (5V), TDS (3.3V), values on the LCD (5v) screen. There is also the ESP-01(3V3) module.
In other words, there are 4 extra 5v values and a 3.3v sensor that I connected on the breadboard. They are all working without any problems in this way now. But I have not yet seen a result of what happens when LED and motor are added.
I do all of these on the breadboard + - by giving 5v, 3v3 and gnd values from the arduino.
It's getting harder than I anticipated.
While using the DS18B20, I connected a 4.7kohm resistor to the 5v+pin legs. All with chips in modules. And a CBB22 ceramic capacitor is connected to the pH sensor. There is no other resistance. Other sensors included
Since you have 12V available it might make more sense if you but 12V relays.
The 5V, and 3.3V sensors can connect to the UNO.
I don't quite understand what you're saying, I apologize. I'm really ignorant about this. I could blow myself up at any moment. Are you saying it can't work with these sensors?
If I buy this 3.3V / 5V Breadboard Güç Kartı Uygun Fiyatıyla Satın Al - Direnc.net® and use it externally, will it still be a problem if I use the 5v input directly for the relay?
No problem